Stone saw mill



(No Model.)

2 Sheets-Sheet 1. F. H. KESSBLER. STONE SAW MLL.

No. 451,199. PatentedApr. 28,1891.

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www ffm #M (No Model.) 2Sheets-Sheet 2. F. H. KESSBLBR.

Y STONE SAW MILL.

No. 451,199. y Patented Apr. 28,1891.

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FRANCIS H. KESSELFIR, OF SAN FRANCISCO, CALIFORNIA.

STONE sAwMlLL.

SPECIFICATION forming part of Letters Patent N o. 451,199, datediApril 2S, 1891.

Application led May 21, 1890. Serial No. 352,670. (No model.)

To @ZZ whom it may concern:

Be it known that I, FRANCIS II. KEssELER, a citizen of the United States, residing at the city and county of San Francisco, and State of California, have invented certain new and useful Improvements in Stone Saw Mills; and I do hereby declare'the following to be a full,

clear, and exact description of said invention,

providing a machine for the sawing of onyx;

and it consists in a millhaving an inner movable frame adapted to lower automatically with the out of the stone, and in providing an endless saw, so as to permit of action upon one or more blocks of stone at the same time.

My invention further consists in suitable guides for the run of the saw and means for the regulation of the tension thereof.

Referring to the drawings forming a part of this specification, in which similar letters of reference are used to denote corresponding parts throughout the entire specification and several views of the drawings, Figure 1 is a side view in elevation 5 Fig. 2, a top plan view; Fig. 3, an end view; Fig. et, a broken detail view showing the guide-rollers, and Fig. 5 a similar view in side elevation.

The outer frame of the mill is composed of the uprights A and cross and longitudinal beams AA2. ForstrengtheningpurposeIprovide the braces u, which, if so desired, maybe dispensedwith. Within said frame I locate the drive-wheels B B', the latter one of which I secure upon the vertical shaft or rod C, which works within the bearings or hangers b, secured thereto, and hanger or bearing b', bolted to the sliding beam C2. v Said wheels are connected by means of the belt I), which passes thereover, and which is operated by any suitable machinery. (Not shown.) Between the uprights A work the sliding cross-beams C C2, which are provided at their ends with the guide and guard strip c.

The letters E E represent the saw-ro1ls, one of which works upon the axle or shaft C, secured within the bearing b', While the other revolves upon the short axle or shaft' b2, located upon the hanger C3 at the opposite end of the mill, extending from the cross-beam C2. Around these rolls works the endless traveling saw F. To the inner face of the sliding cross-beams C C2, I attach the forwardly and downwardlyextending arms F F2, which carry the guide-rollers ff', the guide-rollers f situated so as to actupon the side of the saw, While rollers f act upon the top and bottom, as clearly shown. The saw as it revolves passes between these guides, and is thus prevented from binding within the stone. However, in order to provide against an inclined cut of the stone, I have provided the hangers or arms F3 with the supplemental guide f2, which is movably secured thereto, and which is operated by means of the screw or pin g, so as to bear upon the top of the saw. Thus I am enabled to depress the saw during its working, if so desired.

To the forwardly-extending hanger or arm C3, I secure the adjusting or tightening screw g for the tension of the saw. Upon the longitudinal beams A2 is secured within bearing h the axle I-I, which is provided with the drums h', to which is fastened one end of the chains i. The other end of said chains t' is attached to the sliding beams C C2. Upon the outer end of said axle is provided the winding-drum I, to which the chain t' is fastened. To the other end of this chain is secured the weight 7c. This weight is nearly equal to that of the entire inner frame, which permits of the latter being easily raised for the purpose of inserting a block of stone under the saw with the least amount of exertion. Thus it is obvious that as the saw cuts into the stone the entire frame moves down therewith.

Igy providing an endless saw to the mill I am enabled to operate upon one or more blocks at the same time.

Having thus described my invention, what I claim as new, and desire to secure protection in by Letters Patent of the United States,

1. In a saw-mill for stone, the combination of a frame, vertically-movable cross-pieces IOO Workingbetween the uprghts thereof, sawend beams, adapted to maintain the same in rollers, an endless band-saw, forWardly-exline, and of the adjustable top guide-roller for tending hangers, guide-rollers journaled in maintaining the saW in a horizontal position 15 said hangers and adapted to act upon the for regulating the cut of thesaw, substantially 5 sides of the saw, arms extending from said as set forth and described.

forwardly-extending hangers and carrying a In testimony whereof I have hereunto afscrew or pin for adjusting the same,substan tially as set forth.

1o 2. The combination, with the hereinde scribed stone saw mill, of the endless traveling saw, guide-rollers secured to the movable HGSSGS.

roller bearing upon the top of the saw, and a i xed my signature in the presence of Wit- FRANCIS l-l. KESSELER. In presence of- N. A. ACKER, M. G. LOEFLER. 

